/Engine/Source/Runtime/ApplicationCore/Public/GenericPlatform/GenericApplicationMessageHandler.h
virtual bool OnTouchFirstMove ( const FVector2D & Location, float Force, int32 TouchIndex, [FPlatformUserId](API\Runtime\Core\Misc\FPlatformUserId) PlatformUserId, [FInputDeviceId](API\Runtime\Core\Misc\FInputDeviceId) DeviceID )